netxen: enable tso6, intr coalescing.

Enable tso6 and ipv6 checksum, interrupt coalescing for NX3031.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

4 files changed, 213 insertions, 28 deletions

diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 705fdf10f95d..bcc551ef8519 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -1133,6 +1133,40 @@ typedef struct nx_mac_list_s {
         uint8_t mac_addr[MAX_ADDR_LEN];
 } nx_mac_list_t;
 
+/*
+ * Interrupt coalescing defaults. The defaults are for 1500 MTU. It is
+ * adjusted based on configured MTU.
+ */
+#define NETXEN_DEFAULT_INTR_COALESCE_RX_TIME_US 3
+#define NETXEN_DEFAULT_INTR_COALESCE_RX_PACKETS 256
+#define NETXEN_DEFAULT_INTR_COALESCE_TX_PACKETS 64
+#define NETXEN_DEFAULT_INTR_COALESCE_TX_TIME_US 4
+
+#define NETXEN_NIC_INTR_DEFAULT                 0x04
+
+typedef union {
+        struct {
+                uint16_t        rx_packets;
+                uint16_t        rx_time_us;
+                uint16_t        tx_packets;
+                uint16_t        tx_time_us;
+        } data;
+        uint64_t                word;
+} nx_nic_intr_coalesce_data_t;
+
+typedef struct {
+        uint16_t                        stats_time_us;
+        uint16_t                        rate_sample_time;
+        uint16_t                        flags;
+        uint16_t                        rsvd_1;
+        uint32_t                        low_threshold;
+        uint32_t                        high_threshold;
+        nx_nic_intr_coalesce_data_t     normal;
+        nx_nic_intr_coalesce_data_t     low;
+        nx_nic_intr_coalesce_data_t     high;
+        nx_nic_intr_coalesce_data_t     irq;
+} nx_nic_intr_coalesce_t;
+
 typedef struct {
         u64 qhdr;
         u64 req_hdr;
@@ -1158,6 +1192,10 @@ typedef struct {
 
 #define NETXEN_DB_MAPSIZE_BYTES         0x1000
 
+#define NETXEN_NETDEV_WEIGHT 120
+#define NETXEN_ADAPTER_UP_MAGIC 777
+#define NETXEN_NIC_PEG_TUNE 0
+
 struct netxen_dummy_dma {
         void *addr;
         dma_addr_t phys_addr;
@@ -1236,6 +1274,7 @@ struct netxen_adapter {
 
         int is_up;
         struct netxen_dummy_dma dummy_dma;
+        nx_nic_intr_coalesce_t coal;
 
         /* Context interface shared between card and host */
         struct netxen_ring_ctx *ctx_desc;
@@ -1423,6 +1462,7 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter);
 u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctx, int max);
 void netxen_p2_nic_set_multi(struct net_device *netdev);
 void netxen_p3_nic_set_multi(struct net_device *netdev);
+int netxen_config_intr_coalesce(struct netxen_adapter *adapter);
 
 u32 nx_fw_cmd_set_mtu(struct netxen_adapter *adapter, u32 mtu);
 int netxen_nic_change_mtu(struct net_device *netdev, int new_mtu);
diff --git a/drivers/net/netxen/netxen_nic_ethtool.c b/drivers/net/netxen/netxen_nic_ethtool.c
index 381d55a52162..48ee06b6f4e9 100644
--- a/drivers/net/netxen/netxen_nic_ethtool.c
+++ b/drivers/net/netxen/netxen_nic_ethtool.c
@@ -752,6 +752,117 @@ static int netxen_nic_set_rx_csum(struct net_device *dev, u32 data)
         return 0;
 }
 
+static u32 netxen_nic_get_tso(struct net_device *dev)
+{
+        struct netxen_adapter *adapter = netdev_priv(dev);
+
+        if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
+                return (dev->features & (NETIF_F_TSO | NETIF_F_TSO6)) != 0;
+
+        return (dev->features & NETIF_F_TSO) != 0;
+}
+
+static int netxen_nic_set_tso(struct net_device *dev, u32 data)
+{
+        if (data) {
+                struct netxen_adapter *adapter = netdev_priv(dev);
+
+                dev->features |= NETIF_F_TSO;
+                if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
+                        dev->features |= NETIF_F_TSO6;
+        } else
+                dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
+
+        return 0;
+}
+
+/*
+ * Set the coalescing parameters. Currently only normal is supported.
+ * If rx_coalesce_usecs == 0 or rx_max_coalesced_frames == 0 then set the
+ * firmware coalescing to default.
+ */
+static int netxen_set_intr_coalesce(struct net_device *netdev,
+                        struct ethtool_coalesce *ethcoal)
+{
+        struct netxen_adapter *adapter = netdev_priv(netdev);
+
+        if (!NX_IS_REVISION_P3(adapter->ahw.revision_id))
+                return -EINVAL;
+
+        if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC)
+                return -EINVAL;
+
+        /*
+        * Return Error if unsupported values or
+        * unsupported parameters are set.
+        */
+        if (ethcoal->rx_coalesce_usecs > 0xffff ||
+                ethcoal->rx_max_coalesced_frames > 0xffff ||
+                ethcoal->tx_coalesce_usecs > 0xffff ||
+                ethcoal->tx_max_coalesced_frames > 0xffff ||
+                ethcoal->rx_coalesce_usecs_irq ||
+                ethcoal->rx_max_coalesced_frames_irq ||
+                ethcoal->tx_coalesce_usecs_irq ||
+                ethcoal->tx_max_coalesced_frames_irq ||
+                ethcoal->stats_block_coalesce_usecs ||
+                ethcoal->use_adaptive_rx_coalesce ||
+                ethcoal->use_adaptive_tx_coalesce ||
+                ethcoal->pkt_rate_low ||
+                ethcoal->rx_coalesce_usecs_low ||
+                ethcoal->rx_max_coalesced_frames_low ||
+                ethcoal->tx_coalesce_usecs_low ||
+                ethcoal->tx_max_coalesced_frames_low ||
+                ethcoal->pkt_rate_high ||
+                ethcoal->rx_coalesce_usecs_high ||
+                ethcoal->rx_max_coalesced_frames_high ||
+                ethcoal->tx_coalesce_usecs_high ||
+                ethcoal->tx_max_coalesced_frames_high)
+                return -EINVAL;
+
+        if (!ethcoal->rx_coalesce_usecs ||
+                !ethcoal->rx_max_coalesced_frames) {
+                adapter->coal.flags = NETXEN_NIC_INTR_DEFAULT;
+                adapter->coal.normal.data.rx_time_us =
+                        NETXEN_DEFAULT_INTR_COALESCE_RX_TIME_US;
+                adapter->coal.normal.data.rx_packets =
+                        NETXEN_DEFAULT_INTR_COALESCE_RX_PACKETS;
+        } else {
+                adapter->coal.flags = 0;
+                adapter->coal.normal.data.rx_time_us =
+                ethcoal->rx_coalesce_usecs;
+                adapter->coal.normal.data.rx_packets =
+                ethcoal->rx_max_coalesced_frames;
+        }
+        adapter->coal.normal.data.tx_time_us = ethcoal->tx_coalesce_usecs;
+        adapter->coal.normal.data.tx_packets =
+        ethcoal->tx_max_coalesced_frames;
+
+        netxen_config_intr_coalesce(adapter);
+
+        return 0;
+}
+
+static int netxen_get_intr_coalesce(struct net_device *netdev,
+                        struct ethtool_coalesce *ethcoal)
+{
+        struct netxen_adapter *adapter = netdev_priv(netdev);
+
+        if (!NX_IS_REVISION_P3(adapter->ahw.revision_id))
+                return -EINVAL;
+
+        if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC)
+                return -EINVAL;
+
+        ethcoal->rx_coalesce_usecs = adapter->coal.normal.data.rx_time_us;
+        ethcoal->tx_coalesce_usecs = adapter->coal.normal.data.tx_time_us;
+        ethcoal->rx_max_coalesced_frames =
+                adapter->coal.normal.data.rx_packets;
+        ethcoal->tx_max_coalesced_frames =
+                adapter->coal.normal.data.tx_packets;
+
+        return 0;
+}
+
 struct ethtool_ops netxen_nic_ethtool_ops = {
         .get_settings = netxen_nic_get_settings,
         .set_settings = netxen_nic_set_settings,
@@ -769,11 +880,14 @@ struct ethtool_ops netxen_nic_ethtool_ops = {
         .set_pauseparam = netxen_nic_set_pauseparam,
         .set_tx_csum = ethtool_op_set_tx_csum,
         .set_sg = ethtool_op_set_sg,
-        .set_tso = ethtool_op_set_tso,
+        .get_tso = netxen_nic_get_tso,
+        .set_tso = netxen_nic_set_tso,
         .self_test = netxen_nic_diag_test,
         .get_strings = netxen_nic_get_strings,
         .get_ethtool_stats = netxen_nic_get_ethtool_stats,
         .get_sset_count = netxen_get_sset_count,
         .get_rx_csum = netxen_nic_get_rx_csum,
         .set_rx_csum = netxen_nic_set_rx_csum,
+        .get_coalesce = netxen_get_intr_coalesce,
+        .set_coalesce = netxen_set_intr_coalesce,
 };
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 9d4e9c9dbe0a..ed8aa5ab2668 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -615,6 +615,33 @@ void netxen_p3_nic_set_multi(struct net_device *netdev)
         }
 }
 
+#define NETXEN_CONFIG_INTR_COALESCE     3
+
+/*
+ * Send the interrupt coalescing parameter set by ethtool to the card.
+ */
+int netxen_config_intr_coalesce(struct netxen_adapter *adapter)
+{
+        nx_nic_req_t req;
+        int rv;
+
+        memset(&req, 0, sizeof(nx_nic_req_t));
+
+        req.qhdr |= (NIC_REQUEST << 23);
+        req.req_hdr |= NETXEN_CONFIG_INTR_COALESCE;
+        req.req_hdr |= ((u64)adapter->portnum << 16);
+
+        memcpy(&req.words[0], &adapter->coal, sizeof(adapter->coal));
+
+        rv = netxen_send_cmd_descs(adapter, (struct cmd_desc_type0 *)&req, 1);
+        if (rv != 0) {
+                printk(KERN_ERR "ERROR. Could not send "
+                        "interrupt coalescing parameters\n");
+        }
+
+        return rv;
+}
+
 /*
  * netxen_nic_change_mtu - Change the Maximum Transfer Unit
  * @returns 0 on success, negative on failure
@@ -651,26 +678,6 @@ int netxen_nic_change_mtu(struct net_device *netdev, int mtu)
         return 0;
 }
 
-void netxen_tso_check(struct netxen_adapter *adapter,
-                      struct cmd_desc_type0 *desc, struct sk_buff *skb)
-{
-        if (desc->mss) {
-                desc->total_hdr_length = (sizeof(struct ethhdr) +
-                                          ip_hdrlen(skb) + tcp_hdrlen(skb));
-                netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO);
-        } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
-                if (ip_hdr(skb)->protocol == IPPROTO_TCP) {
-                        netxen_set_cmd_desc_opcode(desc, TX_TCP_PKT);
-                } else if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
-                        netxen_set_cmd_desc_opcode(desc, TX_UDP_PKT);
-                } else {
-                        return;
-                }
-        }
-        desc->tcp_hdr_offset = skb_transport_offset(skb);
-        desc->ip_hdr_offset = skb_network_offset(skb);
-}
-
 int netxen_is_flash_supported(struct netxen_adapter *adapter)
 {
         const int locs[] = { 0, 0x4, 0x100, 0x4000, 0x4128 };
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index b3c084f0c751..91d209a8f6cb 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -58,10 +58,6 @@ static int use_msi = 1;
 
 static int use_msi_x = 1;
 
-#define NETXEN_NETDEV_WEIGHT 120
-#define NETXEN_ADAPTER_UP_MAGIC 777
-#define NETXEN_NIC_PEG_TUNE 0
-
 /* Local functions to NetXen NIC driver */
 static int __devinit netxen_nic_probe(struct pci_dev *pdev,
                 const struct pci_device_id *ent);
@@ -735,8 +731,10 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         netdev->features = NETIF_F_SG;
         netdev->features |= NETIF_F_IP_CSUM;
         netdev->features |= NETIF_F_TSO;
-        if (NX_IS_REVISION_P3(revision_id))
+        if (NX_IS_REVISION_P3(revision_id)) {
+                netdev->features |= NETIF_F_IPV6_CSUM;
                 netdev->features |= NETIF_F_TSO6;
+        }
 
         if (adapter->pci_using_dac)
                 netdev->features |= NETIF_F_HIGHDMA;
@@ -1164,6 +1162,31 @@ static int netxen_nic_close(struct net_device *netdev)
         return 0;
 }
 
+void netxen_tso_check(struct netxen_adapter *adapter,
+                      struct cmd_desc_type0 *desc, struct sk_buff *skb)
+{
+        if (desc->mss) {
+                desc->total_hdr_length = (sizeof(struct ethhdr) +
+                                          ip_hdrlen(skb) + tcp_hdrlen(skb));
+
+                if ((NX_IS_REVISION_P3(adapter->ahw.revision_id)) &&
+                                (skb->protocol == htons(ETH_P_IPV6)))
+                        netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO6);
+                else
+                        netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO);
+
+        } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
+                if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+                        netxen_set_cmd_desc_opcode(desc, TX_TCP_PKT);
+                else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
+                        netxen_set_cmd_desc_opcode(desc, TX_UDP_PKT);
+                else
+                        return;
+        }
+        desc->tcp_hdr_offset = skb_transport_offset(skb);
+        desc->ip_hdr_offset = skb_network_offset(skb);
+}
+
 static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 {
         struct netxen_adapter *adapter = netdev_priv(netdev);
@@ -1185,7 +1208,7 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 
         /* There 4 fragments per descriptor */
         no_of_desc = (frag_count + 3) >> 2;
-        if (netdev->features & NETIF_F_TSO) {
+        if (netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) {
                 if (skb_shinfo(skb)->gso_size > 0) {
 
                         no_of_desc++;
@@ -1212,7 +1235,8 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
         memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
         /* Take skb->data itself */
         pbuf = &adapter->cmd_buf_arr[producer];
-        if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
+        if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
+                        skb_shinfo(skb)->gso_size > 0) {
                 pbuf->mss = skb_shinfo(skb)->gso_size;
                 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
         } else {